Handle bar mounting



Jan. 29, 1952 w, KEETCH 2,583,947

HANDLE BAR MOUNTING Filed Nov. 15, 1948 a F/. 4 1b I! I I l5 Ihwentor G Homeg Patented Jan. 29, 1952 HANDLE BAR MOUNTING William A. Kectch, Erie, Pa., assignor to Lord Manufacturing Company, Erie, Pa., a corporation of Pennsylvania Application November 13, 1948, Serial No. 59,923

2 Claims. (Cl, 74-5512) In motorcycles the vibration transmitted to the hand grips is an objectionable source of fatigue This invention is intended to isolate vibration from the hand grips by a handlebar mounting having small resistance to movement in the vibration range and an increased resistance to movement beyond the vibration range during steering. Further objects and advantages appear in the specification and claims.

In the drawing, Fig. 1 is a perspective of a cause the rubber rims H are much stiffer than the rubber bushing I the rubber rims I'I ofier a greatly increased resistance which provides a desirable positive transmission of steering force to the fork. The clearances l8 and I9 are such that the more positive connection through the rubber rims I! is outside the vibration. range.

What I claim as new is:

1. A handlebar mounting comprising a pair of tube form mountings on opposite sides of the y le fork and handlebar, Fig. 2 iS a D steering axis of the fork comprising inner and w O e handlebar bracket, 3 is a rear outer members anchored to an intermediate view f the han l b r bracket and F 4 is a bushing of rubber or like resilient material, the section on line 4--4 of Fig. 2. longitudinal axis of such mountings extending In the drawing, I diagrammatically indicates 1 in the general direction of the fork, one of the a to y le rk h v Spindle 2 lollrnalled in members of each mounting being fixed to the a ub 3 forming p t Of the motorcycle framefork. a handlebar bracket fixed to the other of Above the motorcycle fork is a handlebar bracket t members of h ounting, a handlebar 5 having bolts 6 connected to the fork on either carried by the bracket; having grips fiset t S de the p a Clearanee Opening 7 D cally and laterally from the mountings whereby ing access to the upper end of the spindle a thrust on the grips in any direction causes and sockets 8 receiving handlebars 9 provided cocking of the mountings, and tops limiting t with hand grips ID. These parts are or may be cooking of the mountings whereby a more posiof common Construction tive steering force may be applied to the fork.

In the operation of the motorcycle, vibrations 2 A handlebar mounting comprising a handlesuch as those due to road shock are transmitted bar having a teering connection t a fork through the fork and unless isolated from the and hand grips for applying a Steel-ing f r e a hand ips cause objectionable fatigue- In the pair of tube form mountings on each side of the present construction these vibrations are isolated center f the handlebar and offset from the hand from the hand grips by tube form mountings I I grips with respect to the line of action of a steerclamped in sockets I2 in the handlebar bracket. ing force said mountings comprising inner and These tube form mountings extend in the Same outer members anchored to an intermediate general direction as the and comprise inner bushing of rubber or like resilient material and metal Sleeves Surroundmg the bolts 5 and the longitudinal axis of such mountings extendouter metal sleeves I4 clamped in the sockets ing in the general direction of t fork one of I2. The sleeves l3 and I4 are bonded to the inner and outer surfaces of a bushing I5 of rubber or equivalent resilient material. At the ends of the inner sleeves I3 are washers l6 which when the bolts 8 are tightened are clamped rigidly against the ends of the sleeves I3. At the edges of the washers I6 are bonded rubber rims I! which have snubbing clearances I8 and I9 with the side walls of the sockets II and with the ends of the rubber bushing I5. The clearances I8 and I9 are sufficient to permit relative movement of the sleeves l3 and I4 incident to normal vibration. As shown in Fig. 1 the hand grips the members being connected to the hand grips and the other of the members being connected to a part moved by the hand grips in. steering, and stops limiting cooking of the mountings under steering forces to provide more positive steering.

WILLIAM A. KEETCH.

REFERENCES CITED The following references are of record in th file of this patent: I

UNITED STATES PATENTS ID are oifset both vertically and horizontally Number Name Date from the mountings. Under straight away driv- 1 334 308 Harley 1 1931 ing conditions when the operators hands are 2193731 Lambert 1940 merely lightly rested upon the hand grips the 2:415:28) Fink b 1947 mountings occupy the position illustrated in 2,421,585 Thin, June 3 1947 which the mountings serve as a soft vibration 2,511320 Benson June 13 1950 isolating connection between the hand grips and the bolts 6 making the steering connection to the FOREIGN PATENTS fork. Under steering forces whether consisting Number Country Date of horizontal forces applied to the hand grips or 19,653 Great Britain Feb. 6, 1913 a combination of horizontal and vertical forces 437,948 Great Britain Nov. 8, 1935 the handlebar bracket 5 is cocked relative to the 531,716 Great Britain Jan. 9, 1941 bolts 6 taking up the clearances I8 and I9. Be- 104.632 Sweden Mar. 26, 1942 

